1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aliina [53]
3 years ago
8

I need help please!!!! Thank you :)

Mathematics
1 answer:
Likurg_2 [28]3 years ago
6 0

Answer:

The correct options are: Option A, C and D

Step-by-step explanation:

We need to choose correct options by solving the given system of equations.

3x+4y=18\\2x-2y=2

Let:

3x+4y=18--eq(1)\\2x-2y=2--eq(2)

First Multiply equation 2 by 2 and add both equations.

3x+4y=18\\4x-4y=4\\------\\7x=22\\x=\frac{22}{7}\\x=3.14

Now, we will put value of x in equation 2 to find value of y

2x-2y=2\\2(3.14)-2y=2\\6.28-2y=2\\-2y=2-6.28\\-2y=-4.28\\y=\frac{-4.28}{-2}\\y=2.14

So, we get x = 3.14 and y = 2.14

Solution set is (3.14,2.14)

The given solution set (2,3) is not the solution of system of equations.

If we put x=2 and y =3 in the first equation:

3x+4y=18\\3(2)+4(3)=18\\6+12=18\\18=18

(2,3) when substituted in the First equation the equation is True.

If we put x=2 and y =3 in the second equation:

2x-2y=2\\2(2)-2(3)=2\\4-6=2\\-2\neq 2

So, (2,3) when substituted in the second equation the equation is false.

The correct options are: Option A, C and D

You might be interested in
A cook needs
GREYUIT [131]

1 cup = 0.5 pints

3 x 0.5 = 1.5 pints = 1 1/2 pints

8 0
3 years ago
(b) Factorise fully 2 a²b + 6ab2
den301095 [7]

Answer:

<h2>2ab(a+3b)</h2>

Step-by-step explanation:

2 {a}^{2} b + 6a {b}^{2}

Factor out common term : 2ab

2 {a}^{2}b \div 2a = a \\ 6a {b}^{2}  \div 2ab = 3b  \\ 2ab(a + 3b)

6 0
2 years ago
Read 2 more answers
7 out of 28 is what percent?
jeka57 [31]
Here's what I did and I checked it So it is correct!!

\frac{7}{28} = \frac{1}{4}

\frac{1}{4} = 0.25

25% is your answer.

28 \times 25\% = 7

--------------------------------------------------------

I hope that helps you!! Any more questions please feel free to ask!!
8 0
2 years ago
Read 2 more answers
The cost to mail a package is $7 for the first 2 pounds and 30 cents for each additional ounce. Which of the following functions
SOVA2 [1]
A. f(x) = 7 + 0.3x

Just re-read your question! Hope I helped!
5 0
3 years ago
Choose the option that best completes the statement. 1. A figure has symmetry with respect to a plane Z if for every point A of
allochka39001 [22]
<span>1.perpendicular bisector.
 2.midpoint.
 3.perpendicular bisector.</span>
3 0
2 years ago
Read 2 more answers
Other questions:
  • 3ab (2ab + 2a -b )-2a (2ab -2b +a )
    9·1 answer
  • What is 20÷1÷[(10÷5)÷2]
    8·1 answer
  • Which features describe the graph? Select all that apply. Group of answer choices positive: (–2, 2) range: (–3, 4] domain: (–3,
    15·1 answer
  • Use the hundredths grid to answer the question and whoever gives me the first answer get brainlest
    14·1 answer
  • Find sec 0 if 0 is in quadrant IV and sin0=-1/5
    9·1 answer
  • What is the distance between the points (3, 7) and (15, 16) on a coordinate plane?
    6·1 answer
  • Which type of data would be best displayed in a box plot?
    5·2 answers
  • PLEASE HELP ASSP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!111
    13·2 answers
  • URGENT!!!!!!!! PLEASE HELP ASAP TIMED!!!!!!!!!!!!!!! HELP!!!!!!!!!!!!!!!!!
    6·1 answer
  • I really really really need help with this
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!